{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["top members employees", "cities of residence", "members", "city of headquarters"], "input": "The Oslo trolleybus system was a trolleybus network operated by  Oslo Sporveier  in Oslo  Norway  between December 15 1940 and February 15 1968 ."}
{"top members employees": [], "cities of residence": [], "members": [], "city of headquarters": []}